choice.js

#!/usr/bin/env node
'use strict';

var ArgumentParser = require('../lib/argparse').ArgumentParser;
var parser = new ArgumentParser({
  version: '0.0.1',
  addHelp: true,
  description: 'Argparse examples: choice'
});

parser.addArgument(['foo'], {choices: 'abc'});

parser.printHelp();
console.log('-----------');

var args;
args = parser.parseArgs(['c']);
console.dir(args);
console.log('-----------');
parser.parseArgs(['X']);
console.dir(args);